Representative vibration emission spectra are key to reliably predict ground borne noise and vibration levels inside dwellings due to the operation of a new metro line. This article first describes an experimental method to reliably assess a ‘baseline’ vibration excitation spectrum representing the force density level applying on the tunnel invert during the passage of one existing underground metro vehicle. Then, simple rules and modelling techniques are proposed to convert the ‘baseline’ force density spectrum to other situations (different vehicle, track, rail unevenness, vehicle speed, tunnel or soil parameters). A hybrid model coupling an analytical train-track interaction model to a numerical tunnel-soil interaction model is carried out and validated from comparison to experimental results. The hybrid model is then used to perform a parametric study aiming at analyzing the influence of the tunnel geometry and soil properties on the force density level and on the tunnel response.
Vibration Emission of Underground Rail Systems: Experimental Assessment, Extrapolation and Parametric Study
Notes Numerical Fluid Mech.
Noise and Vibration Mitigation for Rail Transportation Systems ; Kapitel : 59 ; 546-554
2021-04-09
9 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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